Software
We've compiled a list of 27 free and paid alternatives to Courier. The primary competitors include SMTP, Telegram. In addition to these, users also draw comparisons between Courier and Viber, Postbox, Claws Mail. Also you can look at other similar options here: Security and Privacy Software.
We've compiled a list of 27 free and paid alternatives to Courier. The primary competitors include SMTP, Telegram. In addition to these, users also draw comparisons between Courier and Viber, Postbox, Claws Mail. Also you can look at other similar options here: Security and Privacy Software.
Improve your email efficiency with powerful and reliable SMTP email relay service. Deliver superior transactional emails and deploy them easily with intuitive email API.
Viber is a cross-platform communication application offering voice, video, and text messaging services. It supports high-quality calls, group chats, and multimedia sharing across devices. Viber ensures end-to-end encryption for secure conversations.
SuprSend is a platform for managing multichannel notifications via a single API. It supports email, SMS, push, Slack, and chat, with features like template editors, workflows, real-time analytics, and multilingual support, streamlining notification …
InboxAlly is an email deliverability tool designed to help you send mass emails using your existing ESP while improving open rates and avoiding spam filters. With InboxAlly, you can track email engagement in real-time, monitor progress out of the sp…
SleekFlow is a conversational AI platform that automates and personalizes customer interactions across channels. It provides omnichannel messaging, AI chatbots, and automated workflows to enhance leads, conversions, and support, featuring chat autom…
OneSignal is a comprehensive push notification solution designed to improve customer engagement through mobile push notifications, web push, SMS, email, and in-app messaging. It offers easy setup, real-time reporting, A/B testing, advanced segmentat…
Sinch is a customer communications cloud that enables meaningful conversations across the customer journey. It offers programmable SMS, voice, email, video, and verification APIs for scalable, reliable, and cost-effective communications. The platfor…
Windows
Courier was the evolution of the Calypso email client.
It kept messages and attachments, account settings, filters, address book and program settings (including UI) within a single encrypted mailbox file.
Features
- Support for multiple email accounts
- Configurable, intuitive interface
- Support for POP and IMAP mailboxes
- Ability to turn HTML mail viewing on or off in any window with a single mouse click
- "Color Markers" to help organize your messages
- Automatic mailbox backup
- Mailing list support, including "Blind Send" capabilities
- Superb mail filtering capabilities, including advanced anti-SPAM tools.
- Easily configurable for server and proxy based anti-SPAM programs.
- Address auto-completion when composing mail
- Multi-language spelling support
- Auto-response capability
- Mail templates
- Mail archiving
- Optional password protection for mailboxes
Encrypted Email
Multiple Account support
Multiple languages
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